Noticed I wasn't recieving mail after running pkg update on my mailserver. I found bogofilter had stopped working due to libgsl.so.17 being missing. It appears to have been renamed to libgsl.so.0.17 in the last update to the gsl port.
The mail/bogofilter port did get a version bump when gsl was updated but it looks like the bogofilter-sqlite and bogofilter-tc ports didn't.